Carpet-sewing machine



4 Sheets-Sheet l.

(Model.)

G. GRISBL.

CARPET SEWING MACHINE. N0. 296,744. Patented Apr. 15, 1884.

WITNESS:

By his Atty.

N. FUCHS Pnuwmhngnp wnningmn. D. C.

4 Sheets-Sheet 2.

(Model.)

G. GRISEL.

05mm SEWING MAGHlNB.

No 296,744. Patented Apr. 15, 1884.

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(Model.) 4 Sheets- Sheet 3.

G. GRISEL.

CARPET SEWING MACHINE.

No; 296,744. Patented Apr.A l5, 1884.

(Model.) l 4 Sheets-Sheet 4. G. GRSEL.

A A y CARPET SEWING MHIN. No. 296,744. Patented Apr. l5, 1884.

N, P51165 Fnam-Lmnphen washing (lo UNITED STATES PATENT rErcE.

GEORGE cnrsEL, OE OAKLAND, onmronrm.

CARPET-SEWING MACHINE.

SPECIEFICATION forming part of Letters Patent No. 296,744, dated April 1.5, 1884.

Application filed May 31, A1883. (Model.)

To [ttl whom t may concern.-

Be it known that l, GEORGE Gersen, a citizen of the Republicof France, residing at Oakland, Alameda county, State of California, have made and invented certain new and useful Improvements in Carpet-Sewing Machines;

and l do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings.

My invention relates to asewing-machine of the kind specially constructed and adapted for uniting the edges of carpets, sail-cloth, and other likeheavy class of material. The object sought to be attained is to produce a machine that has the capacity to work on both heavy or thick and light or thin character of material, and that combines also great simplicity of construction and cheapness of manufacture.

The improvements include a novel construction of frame, certain novel construction and combination of needle-operating mechanism, feeding mechanism, and looper mechanism, and a device for controlling the edges of material along the seam to produce a smooth seam on the right side of the material. All the working mechanism is so mounted and arranged upon the frame of the machine that the weight is as nearly as possible equally disposed on opposite sides of a vertical plane passing through the center of the frame. The

l'rame is formed of twoupright metallic plates placed face to face, with a space between them of sufficient width to take in the thicknesses or layers of material to be stitched, and a yoke or arched bracket, in which are mounted, pivoted, and otherwise fixed all the working parts Oi' the feeding and stitch forming mechanism. The two plates are entirely disconnected, excepting at the upper corners, so

that the top is left practically Open and the line of seam is exposed to view at all times.

The attachment of the two plates together is,

made by small blocks interposed between the adjacent upper corners. One of these is permanently fastened in place; but the other is adjustable vertically, and also interchangeable, to permit different forms or sizes to be used. This movable block constitutes a turnneedle to produce a double-loop stitch.

curved, and is carried in a path of corresponding curvature from a center of oscillation located above its line of travel. lts carryingarm is pivoted at the upper end to the top of the arched bracket, to bring the center of motion directly over the center of the frame. 6c The needle then moves in an upwardly-curving upath, and passes through the middle ofV the thickness of material somewhat below its point of first penetration at one side and its subsequent outward passage at the other side. 6 5 The advantages of this operation are that the line of loops is laid in the middle below the turned-in threads and portions of the edges, and the right side ofthe seam presents a smooth nished face .when the material is turned and opened. vThe feed device consists of two wheels or rollers with ronghened peripheries working on vertical axes through slots in the plates from opposite sides of the frame, so as to grasp the material between them. Such principle of feed, however, is already in use; but in its application heretofore the adjustment of the rollers to accommodate and act upon different thicknesses of material was effected by the operator. In the operation of 8o setting the rollers to and from each other the parallel relation of the adjacent faces was disturbed, so that the edges and not the whole length of face bore against the material. This part or feature of my improvement provides 8 5 an automatic adjustment of the feed-rollers and a position of -face or feed surface at all times vertical and in contact for its full length of face with the material. The looper is of the oscillating kind, and co-operates with the 9o A take-up device is used for the louper-thread; but the needle-thread is controlled by the oscillating needle in such manner that no takeup is required therefor.

The following description explains the nature of my said improvements and the man, f ner in which I proceed to construct and apply the same. i

In the drawings referred to by figures and roo letters, Figure l is a front elevation of the machine set ready for use; Fig. 2, a detail View of the looper-cam. Figs. 3 and 4 are details of the adjustable turning-guide. Fig. 5 is a side elevation of the machine, taken from the left-hand side of Fig. 1'. Fig. 6 is a rear viewl of the upper structure; Fig. 7, a detail of the feed-actuating cam. Fig. 8 is a detail view, showing the form of the top portion of the plates A B. Fig. 9 is a plan of the feeding device; Fig. 10, a detail view of one of the feed-levers.

Two plates, A B, are fixed and held in up- I right position parallel with each other by means of an arched upright bracket, M, consisting of two curved sides, M M', having ears m2 on lugs or inwardlyeturned ends m3, and abovethem two similar lugs, m4. By means of screws passing into these lugs the two plates and brackets are firmly fastened together.: The shape of thisbracket is-such .that while affording bearings for all the operative mechanism, excepting the balance-wheel, it brings thel principal weight ofthe parts directly over the center of the machine. The -two curved sides or parts M M are secured together at the top by a screw, p. At this point a stud, P, forms a pivot for the needle-arm. In the space between the two lugs or feet on the ends of the bracket M are pivoted two levers, B R, having thumb pieces or handles on the rear end, and on the front each is bifurcated toform arms'B B', to receive the feed-rollers S between them. The hubs I correspond in length to the space between the lugs m3 m3, and turn upon pivots t t. These two levers then constitute a pair of jaws, and by means of aspring, u, their inner or rollerY bearing ends are forced toward each otherl with constant pressure, the strength of which is regulated by changing the character of the spring. Large rectangular openings d d in the side of the two plates admit the sides of the feed-rollers into the space traversed by the material within the frame. The levers R R thus mounted are free to yield to changes in thickness of the material, and yet to maintain regular contact and continual grasp of the material lto effect the required intermittent progress of the machine. This manner of mounting the feed-rollers insures true parallelism and regular contact of the rollers for the whole length of face of material being stitched.

A rock-shaft, T, is supported on the frame, and is provided with vibrating arms or levers T, each of which carries a feed-pawl, T2, for engagement with a rack provided on the feedrollers. The levers T are located far enough apart on the shaft T to bring the pawls TZ outside of the plates A and B. This rock-shaft obtains motion from the cam W, Figs. 6 and 7, on the inner face of the driving-gear F, the connection being made by the rocking lever T3 and stud T, Contact ofthe feed-pawl with the ratchet-surface on the feed-roller is maintained by a spring, t3, and the pawl is confined during reciprocation by the iixed guide-plate t3. The ratchet-surface s2 upon the feed-roller for the pawl to act against is formed on the center part of the periphery, the outer edges of the rollers being suitably serrated or armed with 4blunt projections to engage with thematerial. The pressure of the pawl is thus applied midway between thebearing parts of the roller, there is less strain upon the feed-pawl, and a corresponding equality of action upon the rollers is obtained in a much better manner than where the force to rotate the roller is'applied at one end.

The feed mechanism is carried entirely in parts of bridge or bracket M, the driving-gear Fbeing mounted on a stud, f, secured in the lower end or extension of the bracket.

The needle-arm G is a straight bar, with a curved offset, g, at one side, to carry a clamp for the needle, and an ear or short lug, g2, on the opposite side of the center line, to take a stud projecting into the groove of the cam G3. The pivot at the top of the bracket affords'a longbearing for the arm. Vibration upon this center is produced by the action of the oblique needle-cam G3 upon the stud. This cam is fixed on ashaft, G4, to which continual motion is imparted from the driving-gear through the pinion x. The movements of these parts are so timed that the-needlearm is swung inward over the center of the pawl at the time the crank-handle is raised. The gears and mechanism are kept close to the frame, while the needle and crank are free to pass each other. The needle-cam shaft operates the looper through the medium of a disk-cam, L, on the end of the shaft outside ofthe frame, and a vibrating lever, L', pivoted at Z, and having oscillation from the pivot forward and back. The lower end of the lever carries a hinged finger, L3, fixed rigidly on the outer end of a short stud or pin, L4, that is free to turn in the end of the lever. A socket in the end ofthe studvholds the looper H. The arm L then gives general motion of oscillation to the looper across the path of the needle, While the rocking finger-piece acts to depress the point of the looper at the end of the forward throw. This depression is effected by contact ofthe end of the projection I3 of the piece L3 with the fixed catch J on the side of the bracket-frame. The looper, being fixed on the stud L4, which is free to move in the end of the arm Lf, and which is moved by the contact of the point l5 with the stud J, will be depressed at the forward part of the throw, as j ust described. This movement of depression is necessary in order to bring the needle into the loop, or above that yportion of the looper-thread which extends from the eye'of the looper back to the stitch last formed. An adjustable stop, q, controls the position of the piece L3, and a spring, V, raises and keeps the looper in position during the general oscillation. The catch J is held by a set-screw passing through a slot, j, so that its action can be adjusted, and thereby the action ofthelooper timed.

The plate B, on that side of the frame oppo- IOS) IIC

rial.

site to the driving-crank, has a vertical limb or prolongation, B", on which is provided a stud, Y, to carry a balance-wheel, W'. Gonnection of the principal shaft is then made with the balance-wheel by grooved pulleys wf ai and a belt, cri. The peculiar form or structure of the frame enables me to carry the principal shaft directly across the top to operate the looper, and this arrangement permits the balance-wheel to be located opposite to the crank. By this arrangement the weights are equally distributed and the machine well balanced. v

The frame of the machine has two points of bea-ring or contact upon the edge ofthe mate- These are the blocks C D at the outer corners. The sides of the plate between these points are carried down below the line of the seam, as before described, to give a clear, unobstructed view of the condition of the work. The rear block is permanently iixed, but the front one, D, is of peculiar construction, to form a turning-in guide. It is adjustable vertically, to regulate the distance of the line of seam from the edge of the material, and it is also removable and interchangeable, to accommodate and properly act on materials of different thickness. This construction is illustrated in Figs. 3 and 4, where two kinds or sizes are shown-one, D, suitable for thick material, and the other, D', for material of less thickness. The lower face of this block has concave guiding-surfaces d. d on either side of a downwardly-proj ecting fin or blade, di, extending longitudinally along the bottom in the center of the groove or concave. This blade terminates just at the transverse groove d* for the needle, and it operates just between the extreme edges of the two pieces or thicknesses of material, to confine the ends of the threads and ragged parts of the edges until by the completion of the stitch the edges are held. In the center of the block, at the front, a separating horn or blade, d5, is Xed in line with the turning-down blade d2. The blades d5 and dZ may be integral or separately formed, if desired. rThis blade d5 is pointed at the end, and its front edge is inclined and beveled or rounded. Its office is to separate the two thicknesses of material and guide them into the grooves on either side, so that the two edges of the material maybe exactly set in line in passing through the groove and be brought at the needle into exact line with each other. The position of this block determines the distance ofthe line of stitching from the edge. It is therefore capable oi' vertical adjustment by means of a screw, g, passing through the plates A B and through a slot, 71in the block, and its proper upright position is controlled by two steady-pins, i fi, working in open slots in the plates AB. One block or guide is substituted for another, according as the material to be stitched is of greater or less thickness.

The gearing F and a; and handle are attached to the short plate A, while the weight of this side is balanced by the long plateB audits attach ed ily-wheel VJ on the other side, so that the machine will ride evenly upon the material. g

Having thus fully described my invention, what l claim, and desire to secure by Letters Patent, is-

1. The combination of the arched bracket M, parallel plates A B, having transverse needle-apertures b b, cut-away sides, and blocks C D, with the feed and stitch-forming devices carried thereby, substantially as described.

2. The combination, with the plates A B, having needle-throats, of the needle-arm G, pivoted in the top of the bracket M, and needle secured in the lower end of the needle-arm below the cam, the transverse shaft having needle-actuating cam G and looper-cam L, and means for rotating said shaft, constructed as described.

3. The combination, with the plates A B, having transverse needle-throats and cutaway sides, of the transverse shaft G", carrying the needle-actuating cam G3, and the oscillating needle-arm G, having a center of motion above the shaft, and brach etz-arms M M', united at the top and forming the support for the pivot ofthe needle-arm at that point, substantially as described.

4. The combination of the frame A B, oscillating needle-arm G, driving-gears F and r,

Acam G, transverse shaft G, cams L W, and the balance-wheel WV upon the side of the frame opposite to the driving-gear, and connections between the parts, substantially as described.

5. The horizontal rock-shaft T, levers T T', feed-pawls TZ T2, springs T5, and means for operating the rock-shaft, combined with the feedlevers and feed-rollers, substantially as described.

6. The parallel plates A B, connected together only at their upper outer corners, in combination with the arched bracket M, having lugs m3 m4, and with the feeding and stitch mechanisms carried thereby, substantially as set forth. Y

7 The combination, with the parallel plates A B, having cut-away sides, and connected together only at their upper outer ends, of the blocks C D, one Xed and the other adjustable,

and the stitch-forming and feeding mechanisms, substantially as described.

8. The combination, with the parallel plates A B, having cut-away sides, and connected together only at the outer corners, of the adjustable and removable turning-in guide D, substantially as described.

9. The combination, in a suitable frame, of the pivoted feed-levers, carrying revolving feed-rollers S, with ratchet portions s2 formed in the center of the rollers, with feed portions on each side, the vibrating levers and pawls T T2, and mechanism for actuating said levers and pawls, substantially as described.

l0. In a carpet-sewing machine, the com bination, with the feed-operating mechanism,

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of revolving feed-rollers having` feeding p0rconsisting of the combination of the pivoted tions, S, and theintermediate ratchet portion, levers R R, revolving feeding-rollers S,`hav s2, formed in the center of the rollers between ing central ratchet portions, s2, spring U, feedthe two feed portions, substantially as depawls T2, and mechanism for actuating` said 5 scribed. v pawls simultaneously,- substantiallyas de- 15 1l. The roller-carrying` levers pivoted to scribed. the frame, having thu1nb-pieces R, arms RR, GEORGE GRISEL. [L and hub I, and the revolving feeding-rollers, Vitnesses: in combination, substantially as described. EDWARD E. OsBoRN, 1o l2. The automatic yielding gripper-feed, E. PATTEN. 

